codeup-web-exercises/dom-query-js.html at main · John-Alejandro/codeup-web-exercises · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
<html>
<head>
    <meta charset="UTF-8">
    <title>DOM: Query and Modify</title>
</head>
<body>

<h1 id="main-header">Hello World!</h1>
<ul>
    <li data-dbid="1">Item 1</li>
    <li data-dbid="2">Item 2</li>
    <li data-dbid="3">Item 3</li>
    <li data-dbid="4">Item 4</li>
    <li data-dbid="5">Item 5</li>
</ul>
<button id="btn1">Button 1</button>
<button id="btn2">Button 2</button>
<button id="btn3">Button 3</button>
<button id="btn4">Button 4</button>
<h2 id="sub-header">Hello Again.</h2>
<p class="sub-paragraph">
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
    eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim
    ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut
    aliquip ex ea commodo consequat. Duis aute irure dolor in
    reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla
    pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
    culpa qui officia deserunt mollit anim id est laborum.
</p>

<script>
    (function() {
        "use strict";
        // TODO: Uncomment next line and get the main header element by id
        var mainHeader = document.getElementById("main-header");

        console.log(mainHeader);

        // TODO: Set inner html of mainHeader to "JavaScript is Cool"
        // mainHeader.innerHTML = "JavaScript is Cool";
        var changeHeader = function () {
            mainHeader.innerHTML = "JavaScript is Cool";
        }
        var btn1 = document.getElementById("btn1");
        btn1.addEventListener("click",changeHeader);

        // TODO: Uncomment the next line and get the sub header element by id
        var subHeader = document.getElementById("sub-header");

        console.log(subHeader);

        // TODO: Set the text color of subHeader to blue
        // subHeader.style.color = 'blue';
        var changeSubHeader = function() {
            subHeader.style.color = 'blue';
        }
        var btn2 = document.getElementById("btn2");
        btn2.addEventListener("click",changeSubHeader);

        // TODO: Uncomment the next line and get all list items
        var listItems = document.getElementsByTagName("li");

        console.log(listItems);

        // TODO: Set text color on every other list item to grey
        // function makeLiGrey() {
        //     for (var i = 0; i <= listItems.length; i++)
        //         if(i % 2 === 0){
        //            console.log(listItems[i]);
        //             listItems[i].style.color = 'grey';
        //         }
        // }
        // makeLiGrey()

            function makeLiGrey() {
                    for (var i = 0; i <= listItems.length; i++)
                        if(i % 2 === 0){
                           console.log(listItems[i]);
                            listItems[i].style.color = 'grey';
                        }
                }

        var btn3 = document.getElementById("btn3");
        btn3.addEventListener("click",makeLiGrey);


        // TODO: Set text color of li with dbid = 1 to blue
        // for (var i = 0; i < listItems.length; i++) {
        //     if (listItems[i].getAttribute('data-dbid') === "1") {
        //         console.log(listItems[i]);
        //         listItems[i].style.color = 'blue';
        //     }
        // }
        var makeLiBlue = function () {
            for (var i = 0; i < listItems.length; i++) {
                    if (listItems[i].getAttribute('data-dbid') === "1") {
                        console.log(listItems[i]);
                        listItems[i].style.color = 'blue';
                    }
                }
        }
        var btn4 = document.getElementById("btn4");
        btn4.addEventListener("click",makeLiBlue);

        // TODO: Uncomment the next line and get all elements with class name sub-paragraph
        var subParagraphs = document.getElementsByClassName("sub-paragraph");

        console.log(subParagraphs);

        // TODO: Change the text in the first sub paragraph to "Mission Accomplished!"
        subParagraphs[0].innerText = 'Mission Accomplished!';


    })()
</script>
</body>
</html>
</body>
</html>